List.of Bug

[LongerFase]

var l=List.of("a","b ");
l.add("rr");

No error hint when coding,but compile error,because List.of return immutableCollection.

[shivam71]

Thanks @LongerFase for noticing this !
You are right that no hint is provided as of now , though this fails only at runtime and not at compile time .
If you check the Java Docs for the List interface it mentions that an UnsupportedOperationException shall be thrown in case one tries to modify an Unmodifiable List. Try the following code :-

var l=List.of("a","b ");
try{
       l.add("rr");
  }catch(UnsupportedOperationException e){
      System.out.println("Caught UnsupportedOperationException ");
  }

This code shall run without any errors .